Typewriting machine



Patented Dec. 8, 1925-.

UNITED STATES PATENT OFFICE.

CORNELIUS B. CORCORAN, DECEASED, LATE OF NEW YORK, N. BY MICHAEL J.

CORCORAN, ADMINISTRATOR, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYBEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING inacnmn.

Application filed animal- 4, 1924. Serial No. 690,418.

To all whom it may concern:

Be it known'that CORNELIUS B. GORCORAN, deceased,- late a citizen of the United States, and late residing in the borough of Bronx,

county of Bronx, city and. State of New York, invented certain new and useful Improvements' in Typewriting Machines, of

' which the following is a specification.

This invention relates to a letter-feeding mechanism of typewriting"machines, and comprises means for feeding the carriage more than one space in certain instances.

At the end of a sentence it is customary to leave two or more letter-spaces. Devices have been used heretofore whereby a single depression of a space-key will cause the carriage to advance a plurality of letterespaces.

The present invention provides a mechanism actuated by the period-type-key,-to

90 enable the operator to make an extra space after the period.

A multlple-spacing pinion that 1s mounted on an arm is moved by the period-key into mesh with the feed-rack of thecarriage, and lifts the same off from the usual escapement pinion. The carriage, after typing, is thus freed to be advanced by its spring until the multiple-spacing pinion is arrested by a stop. Upon the release of the 0 period-key,, the feed-rack reengages the escapement pinion and the other parts are returned to their ori 'nal positions. By adjusting'said stop, t e carriage may be caused to advance any desired number of 36 letter-spaces at the operation of the periodtype-key. .1

Other features and advantages will hereinafter appear. In the accompanying drawings, Figure 1 is a fragmentary perspective view'of an Underwood typewriting machine embodying the present invention.

Figure2 is a fragmentary deta1l i1lustrat-.. ing the position of the multiple-space pinion.

when out of engagement with the feed-rack. Figure 3. is a similar viewto Figure 2, but shows the multiple-space pinion in'en- 'gagement, the rack having been liftedofi the escapement pinion and advancedseveral spaces.

Figure 4 is a plan view, showing a detail of the pinion mounted on the lever whichis connected to the period-key.

" Key 10, for typing the period-character, I

is mounted on bar 11 fulcrumed in the usual manner on rod 12. A twisted connecting link v13 extends from bar 11 to one arm of-a bell-crank 14, fulcrumed on an upstanding bracket 15 attached to the frame of the machine. A link 16 connects the opposite arm of the bell-crank 14 to another bellcrank 17 having a forked'arm 18 in which is mounted a multiple-spacing pinion 19. Pinion 19 is movable with arm 18 to mesh with feed-rack 20 of carriage 21 to lift the rack 21.) off a pinion 22' of the escapement A connecting link 24 is bar 26 swings about point 27 on theusual segment late.

When ey 10 is depressed, the type-bar 26 V is swung rearwardly until the type strikes-- the platen 30 to printthe period, and simultaneously bell-crank 17 raises pinion 19, through the linkage above described, to mesh with and lift rack 20, and in doing so disengages the same partly from the contact with'esca-pement pinion 22. The stud 28 of link 24 has at this time reached what is nominally the end of theslot 29 in type-bar 26', the parts being in the position shown in Figure 5; and, in order to provide for an additional movement necessary to complete- 1y disengage carriage 21, slot '29 is extended radially to form a cam-slot 29, permitting thestud 28 of link 24 to have further travel therein. The rack 20 is thereafter lifted free from the escapement pinion '22, and the impelling mechanism of carriage 21 ad-' vances the latter a number of s aces, as determined by the rotation of t e multiplespace pinion 19.

The extent of rotation of pinion 19 is determined by an adjustable stop in the form of a screw 31, which may be inserted'in one of a number of apertures 32 formed in the side of one of the prongs of forked arm 18. This stop 31 is contacted by a c'o-operating projection or stop 33, secured to pinion 19. A spring 34 normally maintains the pinion 19 111 retracted position, holding the project1ons 33 in engagement with a fixed stop 35 secured on the forked arm 18, best shown in 2 and the carriage 21 to feed forwardly or he jumped two spaces thereafter; if placed in the second aperture, the'carriage will feed forwardly or be jumped three spaces, and so on. .The positions of apertures 32 may be I so chosen that, on releasing periodkey 10,

the feed-rack 20 will be in proper position to mesh with the teeth of the escapement pinion 22. j e

Key-lever spring 37 which may preferably be made somewhat stronger than regular key-lever springs, Wlll return the pinion 19,

type-bar 26 and the'other moving interconnecting members to their original positions I after the period-key 10 isreleased.

Variations may be resorted to within the scope of the invention, and

improvements may be used without others.

Having thus described the invention, I

claim:

1. In a typewriting machine, the combination of a carriage, letter-feeding mechanism therefor, a type, an element for operating said type and controlling the operation of said letter-feeding mechanism, and selective means for automatically securing a variable number of blank spaces upon the operation of said type, including means controlled by said operating element at the'operation of said type, for releasing the carriage from the letter-feeding mechanism and jumping the carriage forwardly a predetermined-imiform number of spaces from substantially any po- ,sition of the carriage in its travel, said means including apart adjustable to determine the number of blank letter-spaces jumped byvthe carriage.

2. In a typewriting machine, a type, a

type-operatingkey, a carriage, a feed-rack' connected thereto, escapement mechanism including a pinion, means for lifting the rack off the pinion, means controlled by said key for operating said lifting means at the typing operation, a' stop brought into use by said key for arresting the carriage after jumping a uniform number of-spaces from ortions of the r substantially any position of the carriage.

and adjustable means to determine the number of lank spaces to be eration of said key.

3. In a typewriting machine, the combination of a type, a type-operating key, a powerdriven carriage having. a mechanism, a device movable by said carria e but normally disconnected therefrom, an means controlled by said key at the typing operation for connecting said movable device to the carriage and releasing said feeding mechanisnn'and means adjustable to determine the number of blank letter-spaces said device shall be moved by said carriage.

4. In a typewriting machine, the combination of a type, a type-operating key, a powerdriven carriage having a rack, a pinion normally disengaged from said rack, said key having means to connect said pinion with said rack for controlling the feed movement-Aof the carriage, said carriage having a jumped by the opletter-feed mechanism releasable by said key,

and means adjustable to determine the number of blank letter-spaces jumped by the carriage while driving said pinion.

v 5; In a typewriting machine, a carriage, letter-feeding mechanism therefor, an operating element, means for releasing the carriage from the letter-feeding'mechanism and jumping the carriage forwardly a uniform number of spaces from substantially any position of the carriage in its travel with one stroke of the operating element, and means -actuated by the same stroke of said element to type a character prior to releasing and jumping the carriage, said first means 1ncluding a part adjustable to determine the number of letter-spaces jumped by the car- 1 riage. V Y I 6. In a typewriti'ng machine having a platen, in combination, a carriage, a feedrack connected, thereto, escapement mechanism including a pinion, means for lifting the rack off the pinion, a type-bar carrying type, connecting members for lifting said rack and for concomitantly actuating the type-bar to type a character, a key to operate said members, an adjustable stop brought into use by said vkey for arresting the carriage after jumping a uniform number of spaces from substantially any position of-the carriage, and means on one of the members to permit the striking of a type on the platen prior to lifting said rack free from the pinion.

7. In a typewriting machine, the combineletter-feed I tion of a power-driven carriage having a lettor-feeding mechanism, a device movable by said carriage but normally disconnected therefrom, an operating element to concomia tantl ty :1 character and connect said mova le difvice to the carriage for releasing said feeding mechanism, means connected with said elementto allow releasing of said feeding mechanism only after completion of the typing operation, and means adjustable to determine the number of letter-spaces said device shall be moved by said carriage.

8. In a typewriting machine, the combination of a type, a type-operating key, a

power-driven carriage having a rack, a pinion normally disengaged from said rack. said key having means to connect said pinion with said rack for controlling the letterfeeding movement of the carriage, said carriage having a letter-feed mechanism releasable by said key, and means adjustable to control the number of blank letter-spaces jumped by the carriage While driving said pmlon.

9. In a typewriting machine having a platen, in combination, a carriage, a feedrack connected thereto, escapement mecha-' nism including a pinion, a type-bar carrying type, connecting members for lifting said "ack and .for concomitantly actuating "the type-bar to type a character, a key to o erate said members, means operable by sald key for-lifting therack off the pinion, an

, adjustable stop brought into use by said key for arresting the carriage after jumping a uniform number of spaces from substantially any position of the carriage, and

means on one of the connecting members to permit the striking of a type on the platen prior to lifting said rack free from the pinion, said means including a part for retracting the type, from the platen after printing to prevent blurring a work-piece during the subsequent shifting of; the platen.

10. In a typewriting machine, in combination, a carriage, a feed-rack connected thereto, escapementmechanism including a pinion, a type-bar, connecting members, one having a stud moving in a slot in said typebar for actuating the latter to typing position, and another for simultaneously lifting said rack partly 'ofi said escapement pinion, an extension to said slot for allowmg further movement of the stud therein to permit the rack to be lifted free from the pinion to release the carriage, a key to operate said members with a single stroke, and

' an adjustable stop brought into use by said key for arrestin the carriage'after jumping a uniformnum er of spaces from substantially any position of the carriage.

11. In a typewriting machine having a platen, in combination, a carriage, a feedrack connected thereto, escapement -mechanism including a pinion,'a type-bar carrying type, connecting members, one having a stud moving in a slot in said type-bar for actuating the latter to typing osition, and another for simultaneously liftmg said. rack partly off said escapement pinion, an extension to said slot for allowing further movement of the stud therein to'permit the rack to be lifted free from the pinion to release the carriage, a key to operate said members with a single'stroke, and an adjustable stop brought into use by said key for arresting the carriage after jumping a uhitorm number of spaces from substantially any position of the carriage, said slot-extension being cam-shaped to retract the type-bar from the platen after typing for preventing a. blur on a work-piece during the letter space jumping movement of the carriage.

nation, a carriage, a feed rack connected thereto, escapement mechanism including a pinion, a type-bar, connecting members, one having a stud moving in a slot in said type= bar foractuating the latter to typing posaid rack partly off said escapement inion, an extension to said slot for allowing urther movement of the stud therein to permit the sition, and another for simultaneouly lifting I nism including a pinion, a type-bar carrying type, connecting members. one having a stud moving in a slot in said type-bar for actuating the latter to typing position, and another for simultaneously lifting said rack partly ofl said escapement pinion, an extension to said slot for allowing further move-' ment of the stud therein to permit the rack tobe lifted free from the pinion for releasing the carriage, and a key to operate said members with a single stroke, said slot-- extension being cam-shaped for retracting the type bar from the platen after typing to revent blurring a work-piece during the otter-space movement of the carriage.

14. In a typewriting machine having a step-by-step letter-space moving carriage, in combination, a platen, a type-bar, a key-lever for operating said type-bar, a member connecting the key lwer to the type-bar, said member having a stud thereon moving in a slot in the type-bar for actuating the latter to typing position, and an extensionto said slot to permit further movement of the stud therein for retracting the type-bar from the platen after typin to prevent blurring a work-piece during the letter-space movement of the carria e. MIC EL J. CORCORAN, V Ad-nu'nistmtor of the Estate of Oarm-Zi-us B. aorcoran, Deceased.

75 12. In a typewriting machine, in combi- 

